mrxnode How-To Guide
Step-by-step recipes for the everyday tasks you run on a mrxnode device — adjusting network settings and checking disk health — so you can keep the node online and healthy on site.
Network Configuration
To change network settings, use the NetworkManager TUI (Text User Interface):
sudo nmtui
This opens an interactive menu where you can:
- Edit a connection - Modify existing network configurations (IP address, DNS, gateway)
- Activate a connection - Enable or switch between network profiles
- Set system hostname - Change the device hostname
Navigate using arrow keys, Enter to select, and Esc to go back.
Setting a Static IP
- Run
sudo nmtui - Select Edit a connection
- Choose your network interface (e.g.,
eth0orWired connection 1) - Change IPv4 CONFIGURATION from
AutomatictoManual - Add your IP address, gateway, and DNS servers
- Select OK to save
- Go back and select Activate a connection to apply changes
Disk Health Monitoring
To check NVMe disk health and usage statistics:
sudo nvme smart-log /dev/nvme0n1
Key values to monitor:
| Field | Description |
|---|---|
power_on_hours | Total hours the disk has been powered on |
percentage_used | Estimated percentage of disk life consumed (0-100%) |
available_spare | Remaining spare capacity for wear leveling |
critical_warning | Non-zero indicates a problem requiring attention |
media_errors | Count of unrecoverable data integrity errors |
A healthy disk should show critical_warning: 0 and percentage_used well below 100%.
Related Features
- mrxnode Overview — device setup, registration, and the on-device command-line tools
- Cheatsheet — quick command reference for day-to-day node operation
- Troubleshooting — recovery patterns when a node stops responding
- Container Deployment — run and manage containers on the node
- mrxnode Hardware — the device specification sheet